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Magnaflow Catback Exhaust (99-04 GT, Mach 1)

30 Reviews
Our Price

$661.69

  • Item #48012
  • MPN #15671
  • Market Price $727.99
  • You Save 9% ($66.30)
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Product Videos Customer Photos
Features
  • Classic muscle car sound
  • 2.5" Mandrel-bent tubing
  • Durable Stainless steel construction
  • 3.5" Polished tips
  • Fits 99-04 GT, Bullitt, and Mach 1 Mustangs
Description
Free Flowing Exhaust.   Magnaflow delivers the ultimate exhaust for the 99-04 GT, Bullitt, and Mach 1 Mustangs by reducing back pressure for a free flowing exhaust that produces more power and torque where it belongs - at the rear wheels.
Classic Musclecar Sound. The Magnaflow Catback Exhaust System with it's set of chambered mufflers will give your Mustang a loud classic exhaust note of the muscle cars of the past.

Quality Construction. Each piece is made from mandrel bent 2.5" stainless steel tubing for long life and a perfect fit. The system ends with brightly polished 3.5" stainless tips, that exit in the stock location for impressive good looks.


Application. Made to be a direct bolt on, this Maganflow catback will bolt straight up to the factory Mid-Pipe without any extra modifications required on the 1999-2004 GT, 2001 Bullitt, or 2003-2004 Mach 1 Mustang to give it a deeper, classic sound.

Lifetime Warranty is included with all Magnaflow catback systems.

Mustang Fitment: 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (2) flow tubes
  • (2) tailpipes
  • (2) mufflers
  • (2) chrome tips
  • (2) set screws w/ allen wrench
  • (2) tip hangers
  • (6) 1.25" x 2.5" band clamps
  • (2) mounting flanges for header connection
Installation Info
Tech Specs
Catback Exhaust Specifications
Piping Material: Stainless Steel Tip Material : Polished Stainless Steel
Piping Size: 2.5" Tip Size: 3.5"
Muffler Type: Chambered Fitment: 1999-2004 GT / Mach 1 / Bullitt Mustangs
Fitment
  • Bullitt - 01
  • Mach 1 - 03, 04
  • GT - 99, 00, 01, 02, 03, 04

Most Helpful Reviews View All

Overall Rating 4.8/5 Write a Review
5/5
Fits and sounds great

Put this on my 99 GT. Took a little effort to get it all lined up but it is doable. With stock h-pipe the sound was a little deeper and louder than stock but not much. I then added an off-road x-pipe.

Read More
Helpful (10) (0)

5/5
Very Nice Exhaust

This kit is the best. The fit is perfect, not too loud when cruising but if you open her up she howls. When installing it's okay to lift by the frame but before you tighten everything up make sure to

Read More
Helpful (6) (0)

Videos

Hey I’m Justin with AmericanMuscle.com, and this is my quick look into the Magnaflow catback exhaust system fitting the 99-04 Mustang GT and Mach 1. Right off the bat, I can tell you this isn’t going to View Full Transcript

Customer Photos (12) View All

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Q & A (2 Questions, 3 Answers) Ask a Question

Magnaflow catback exhaust installation? The actual color of my 2004 GT is Merlot Clearcoat, but that option was not listed. My question is: do you need any type of heat shield between the mufflers and the floor pans to keep the inside floors from becoming too hot? The original factory mufflers had heat shields attached to the top of them.

wildman650 Year: 2004 Model: GT

Good Question (0) (0)
  • No u don't need heat shields. I have installed many catbacks and seen just about every one possible on different cars. There is no heat shield on any of them. The surface area of aftermarket mufflers is also much smaller, so there is less area to heat up and displace heat than on factory setup. I have had magnaflow and slp catback on my 03 cobra and there are no heat shields.

    Helpful (0) (0)

    03SVTsnake Year: 2003 Model: Cobra

    Top 250 Contributor

Show 1 more answer Answer This Question

Will this work with the sn95? Would this exhaust system fit the sn95? Can I just only modify the hangers so this setup can fit?

Cheche15 Year: 1995 Model: V6

Good Question (0) (0)
  • yes if it is from 99 to 04

    Helpful (0) (0)

    cs9245 Year: 1994 Model: GT

    Top 250 Contributor

Answer This Question

Reviews (30) Write a Review

  • 5 Stars .83 83%
  • 4 Stars .10 10%
  • 3 Stars .07 7%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.8

out of 5 stars

27 Customers Recommend this Product

Installation Time:Full Day

Installation Cost:$100-$250

  • Loudness / Volume: 4.125 4.1/5
  • Exhaust Note: 4.5 4.5/5
  • Fit & Finish: 4.4375 4.4/5
  • Bang For Your Buck: 4.125 4.1/5
Filter By Sort By
  • 5/5

    Fits and sounds great

    November 29, 2009

    Put this on my 99 GT. Took a little effort to get it all lined up but it is doable. With stock h-pipe the sound was a little deeper and louder than stock but not much. I then added an off-road x-pipe. This increased the volume. The sound is deep. At idle, there is little difference from stock. But when on the gas, it sounds great. Definitely does not sound like Flowmasters. There is no drone or resonance while driving.

    Jason

    Year: 1999 Model: GT

    Helpful (10) (0)

  • 5/5

    Very Nice Exhaust

    June 29, 2010

    This kit is the best. The fit is perfect, not too loud when cruising but if you open her up she howls. When installing it's okay to lift by the frame but before you tighten everything up make sure to lift car but the differential so that you know the clearances are good. Very good exhaust for the money!!!

    Jeremy

    Helpful (6) (0)

  • 5/5

    New Exhaust

    April 04, 2009

    Just got it installed yesterday great sound, better acceleration. Way worth the money.

    David

    Helpful (5) (0)

  • 5/5

    Awesome

    November 18, 2009

    Awesome sounding Catback Exhaust setup.. I got this for my V6.. with O/R Pypes X pipe and BBK Shorty Headers. its an Awesome setup just need to Tune it now.. Overall Awesome Purchase.

    Joel Zervoulakos

    Helpful (4) (0)

  • 5/5

    Magnavrooom

    September 02, 2009

    Put this on my '99 GT along with an AEM cold air and the AM strut tower brace and my car has never sounded or run better. I'll be back for more parts AM...

    Steve

    Year: 1999 Model: GT

    Helpful (3) (0)

  • 4/5

    Magnaflow

    January 06, 2009

    I just put these on my 2004 GT and man do they sound great! For my completely stock GT, it made it a little louder, but more muffled sounding. A new air intake or headers would help out the sound too. Install was kind of easy, but taking out the rubber grommets took forever. Overall, it took about 2 hours, but looks fantastic!

    matt w

    Year: 2004 Model: GT

    Helpful (2) (0)

  • 5/5

    LOUD

    April 11, 2008

    My 04 GT was pretty quiet stock. After i installed the magnapacks along with the magnaflow o/r tru-x x-pipe the car sounded like a beast. The exhaust makes the car sound like an old muscle car at idle, but at WOT it sounds really crisp. ITS ALMOST TOO LOUD!! 100% worth the money. I have no regrets. Id buy this product again and i HIGHLY recommend it.

    Jordan

    Year: 2004 Model: GT

    Helpful (2) (0)

  • 5/5

    Great Product

    October 04, 2007

    I have this on my V6 mustang using the adapter available on this site. It looks wicked and sounds even better.

    Mohamed

    Helpful (2) (0)

  • 5/5

    Great exhaust

    January 03, 2012

    Great exhaust with an upgraded sound for your GT. I had a shop install it at the same time as my new clutch and it ran me about 550 together.

    Ian99

    Year: 1999 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Atlanta, GA

    Helpful (1) (0)

  • 5/5

    LOUD!

    March 12, 2012

    i put this cat back on my mach 1 and with an off road h pipe and wow does it sound good, deep, loud, and just mean sounding

    mach1stang

    Year: 2004 Model: Mach 1 Driving Style: Street / Strip 'Stangs I have owned: 1

    Helpful (1) (1)

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